More info for my other question

Rain water is a great way to introduce heavy metals and other very common pollutants to your plants, lol. ppm converted from EC is not to be trusted. There are 4-5 different conversion factors that different manufacturer's use, which should be explanation enough as to why it's a trash conversion. also, shit or get off the pot as far as bottom or top feed. just keep it simple instead of trying to be overly sophisticated and extra effort with no return on investment. Top-down feeding is superior because it has less risk of buildup, especially if in soilless substrate where the 10% runoff is essential to maintaining an equilibrium concentration of nutrients. flushing should be reserved for extreme catastrophes. you can usually fix problems without a flush. Should avoid it as much as possible because it's a pretty big negative impact for the plant. with all the flip-flopping and sophistry, it'd be pretty hard to diagnose at this point. Your own behaviour trying to fix it could be as much of a causal factor as the original reason. could be micros - deficient or inhibited. K-tox possible, too, which if you recently boosted K, makes it more likely. You sure that rain is consistently a 7 pH, that's be incredibly unusual, lol. The good thing is it looks minor and slow moving. you can be patient instead of throwing kerosene on a fire with early guesses. Find enough cross-reference information to make a more informed choice. you can be patient.

Hey mate, this is still the same issue from your last question, nothing really changed. Using pH 7.0 rainwater over time tends to push soil pH up, especially with organic mixes and slow release ferts. Once soil pH drifts too high, potassium and magnesium uptake slow down hard in bloom. Slurry pH 6.7 is already a bit high for flower. Same advice as before: Lower your feed pH to 6.2-6.4, add extra K and Mg, check your runoff, and let her finish. Standard late flower behaviour for this setup, ✌️🍀❤️

Hi there. Some micronutrients can absorb by PH of 6.3 for best conditions on Soil. Maybe there ist a little lag of absorbation. My best results when using Rainwater to get in with a little add of CalMag (Mineral) as Canna CalMag Agent. In other way Check the runoff for PH or EC diffrences that harm the absorbation. Best regards💚✌️

Check soil ph it’s possible the soil has gotten to alkaline Also kinda looks like maybe you have been over watering and caused some root rot Also looks like not enough nutrients possibly